i'll tell you it's not a philosophical disagreement, it's a crisis of self-government. >>> a disturbing story out of new york tonight next. police are looking for a young woman who allegedly pushes a man onto the subway tracks when a train was approaching the station in queens. police have just identified the man as 46-year-old suendo sen of queens, new york. this is the second time in a month a passenger was pushed to his death in front of a train. it's raising some serious questions about the safety of the nation's largest subway system. >> it was -- it was horrible. horrible. it echoed through the bottom. i never want to hear something like that again. >> reporter: this man heard the final scream of the victim. james callanan's train was halted because of the incident. >> they said that this is the last stop on the 7 train. debris fell on the tracks. that's all they were telling people. >> reporter: witnesses say the victim was standing on the edge of this subway platform in queens when a woman who was pacing and talking to herself pushed him onto the tracks. the victim was a graphic